Muffler cut-out



, ALLYN n. eoorim, or mansnnnnrowiv, IOWA.

MUFFLER cur-our.

Application filed November 26, 1917.

To aZZ whom it may concern:

Be it known that I, ALLYN R. COOPER, a

' citizen of the United States of America, and

resident of Marshalltown, in the county of Marshall and State of Iowa,have invented new and useful Improvements in Muffler Cut-0uts, of whichthe following is a specification.

The object of this invention is to provide an improved construction fora muffler cutout for completely shutting off the flow of exhaust gasesthrough the muflier at times.

A. further object of this invention is to provic e an improvedconstruction for muffler cut-outs in which the exhaust gases are easilyand readily deflected through the exhaust opening when the valve isopened, and are positively prevented from flowing through such openingwhen the valve is closed.

A further object of this invention is tov provide an improved means formounting a cut-out device on the exhaust pipe of an internal combustionengine without cutting said pipe into two pieces or removing a portionof its length.

A further object of this invention is to provide an improved cut-outdevice which is susceptible of being positioned for operation by andthrough a slight movement of the operating mechanism..

A. further object of this invention is to simplify and facilitate theinstallation or attachment of the device in position for use.

My invention consists in the construction, arrangement and combinationof elements hereinafter set forth, pointed out in my claims andillustrated by the accompanying drawing, in which- Figure 1 is anelevation illustrating a portion of an exhaust pipe with my improvedcut-out device attached thereto in position for practical use. Fig. 2 isan elevation at right angles to Fig. 1. Fig. 3 is a longitudinal sectionof the same device. dotted lines indicating open position of the cutoutvalve. Figs. 4 and 5 are mating halves of a cross-sectional view on theline l-5 of F 1.

In the construction of the device as shown the numeral 10 designates anexhaust pipe which leads from an internal combustion engine to a mufflerdevice (not shown). An elongated hole 11 is cut in the plpe 10 for theinstallation and attachment of my cutout device. The cut-out device isformed of Specification of Letters Patent.

Patented Nov. 9, 192.0.

Serial No. 204,052.

twomating semi-cylindrical members 12, 13 adapted to be fitted upon andinclosea section of the pipe 10 and cover the hole 11 therein. Themember 12 is formed with apertured ears 14 and the member 13. is formedwith apertured cars 15 adapted to register with the cars 14-, and saidmembers are adapted to be secured together by cap screws or bolts 16passing through the ears 14 and threaded into the ears 15. An extensionor bypass 17 is integrally formed on the cut-out member 13 and is soarranged as to be in communication with the aperture 11 of the exhaustpipe 10. The aperture 11 and bypass 17 each have an area greater thanthe area of the exhaust pipe 10. The extension 17 is formed at one endwith a horizontal socket or recess 18 arranged transversely relative tothe aXis of the pipe 10 and at the end of the aperture 11 farthest fromthe engine, said recess lying wholly at one side of the longitudinalplane of the seatnext described. The extension 17 also is formed with aperipheral ledge or seat 19 adjacent the pipe 10 and a valve plate 20 ismounted or seated on said ledge and when in such position closes thecommunication be tween the pipe 10 and extension or by-pass 1? throughthe aperture 11. The aperture 11 is of sufiicient size to permit thevalve 20 to be swung into the pipe 11, in the position indicated bydotted lines in F ig. 3, to place the cut-out in operation. A shaft 21is mounted in the recess 18 and extends into and through bearing bosses22 formed on the cut-out member 13, the axis of said shaft being at oneside of the plane of the valve plate 20. The valve plate 20 is bent nearone end and extends within a slot in the shaft 21 and is secured theretoby one or more pins 23. A crank or lever 24 is formed on one projectingend portion of the shaft 21 to which any suitable operating meansbesecured for operating-the valve. A tension spring 25 is coiled on theopposite projecting end portion of the shaft 21 and has one end seatedin a slot or notch 26 in said shaft and the other end hooked around theadjacent boss 22. It is the function of the spring 25 to hold and returnthe valve plate 20to closing position on the seat 19. j

In practical use the valve 20 is oscillated to open position by themeans described, the

crank or lever 24L moving through an arc in the direction indicated bythe arrow A in 1, the valve taking the position indi pipe 10 to themufiier and causes such gases to be deflected and cto pass through theaperture 11 and bypass 1? to the atmoshere. .The course of eases throu hthe v o 2::

is free and unre-- aperture 11 and by-pas strictedand of larger areathanthe pipe 10 and consequently there is no reaction toward the engineand no choking action upon thegases. When in such position the valve 20substantially closes the pipe it) beyond the aperture 11 and little ifany of the exhaust gases are permitted, to pass through the muffler. Avery slight movement of the crank or lever 2a is suficient to cause themovement above described, and the passage of gases in thedirection ofthe arrow B in Fig. 3 tends to hold thevalve in the open position. Uponrelease of the operating mechanism the spring 25' acts to return thevalve to its closing position or seat on'the ledge 19, whereupon thegases are permitted to' traverse the pipe 10 to the muffler andnone ofsuch gases are permitted to escape through the aperture 11 and by-pass.it will be noted that no cutting of the pipe 10 nor removal of portionsthereof is necessary to install thedevice, with the exception of thecutting of the aperture 11. The device is then very readily attached tothe pipe by fitting the members 12, 13 there to in-such manner that thebypass 1T registerswith the aperture 11., and insertion of the 'boltslfi. i r

i There is no obstruction on the inner surwith ail-exhaust pipeunobstructed on its interior and formed with a downwardly-opening vent,'ofsemi-cylindrical members I adapted to be mounted in embracing rela--tion on said pipe, means for securing said members together, whereby endportions of said members are clampedon said pipe on opposite sides ofsaid vent, the body portlons of said members being spaced from andcircumferentially of-said pipe and surrounding said vent, one of saidmembers being formed with an integral hollow extension registering withsaid vent, said vent and'extension being relatively long, the dischargeopening of said extension lying in a plane parallel with the centrallongitudinal line of saidpipe, a shaft journaled in said member andhoused from contact with gases discharged through said extension, whichshaft is formed with a slot, a valveplate bent laterally near one endand having' its shorter end portion extended within said slot and fixedto said shaft and having a seat on the extension and adapted, whenseated, to close the mouth of said extension, and also adapted to bemoved through said vent substantially to close saidp pe, an operatingleverformed on said shaft outsid said member and extension, and a springwound on and engaging said shaft outside said member and extension andtending to hold said valve-plate in closing relation to said extension.

2.:In a inuiiier cut-out, a substantially cylindrical valve casingadapted to b= mounted on a pipe having an opening therein, said'casingbeing formed with anopening registering with the opening in said pipe,and also'formed with a valve-seat surrounding said opening' and disposedparallel'with theaxis of said pipe, said casing also being formed with arecess parallel with one endof said seat, which recess is wholly at oneside of the plane of said seat and disposed transversely of the casing,a shaft disposed transverselyof and journaled in said casing andextending through said-"recess, the axis of said shaft lying at oneside; of the plane of said seat, a valve plate disposed within saidcasing and adapt ed to be moved between a position of rest on said seatand a position. obliquely of said casing and pipe, which valve plate isbent near one end, the shorter end portion of said valve plate extendingwithin said recess and being fixed to said shaft, and means foroscillating said shaft to move said valve plate.

ALLYN n. ooorns,

